Safety helmet



FIG. 1 is a side perspective view of a safety helmet showing my newdesign;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a safety helmet, as shown and described. 